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Cisco IOS XR Troubleshooting Guide for the Cisco CRS-1 Router
OL-21483-02
Chapter 6 Troubleshooting the Control Plane Ethernet Network
Troubleshooting the Multishelf System Router Topology
Each SC and RP has two internal switches (0 and 1). Each internal switch has two Gigabit Ethernet
control ports. Port 1 is on the front panel and is used as a control port for interchassis connectivity
(Gigabit Ethernet control). Port
2 is used to connect between the two internal switches in the SC. The
Fast Ethernet (FE) ports of the switches are used within the chassis to connect to other nodes
(intrachassis connections).
If an external Catalyst 6000 Series Switches or Integrated Control Switches (SC-GE-22) are used, use
the show spantree mst 1 or show udld gigabit ethernet command to show the ports.
SUMMARY STEPS
1. show platform
2. Verify that all physical Catalyst switch connections are made.
3. show controllers switch 0 ports location node-id
4. show controllers switch 1 ports location node-id
5. show spantree mst 1 brief location node-id
6. show controllers switch 0 statistics location node-id
7. show controllers switch 1 statistics location node-id
8. show controllers backplane ethernet detail location node-id
9. Place the DSC in ROMMON mode:
a. admin
b. config register 0x0
c. exit
d. reload
10. show_bcm_links
11. Exit ROMMON mode:
a. confreg 0x102
b. reset
12. Contact Cisco Technical Support if the problem is not resolved
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